As part of a recent extended play session with Pokémon Let’s Go Pikachu and Let’s Go Eevee, it has been discovered that the upcoming duo of Pokémon games do not feature Held Items and Abilities. The following confirmation comes from Serebii webmaster Joe Merrick:
As many people have speculated through various demos and videos, there are no held items in the game and no option to make a Pokémon hold an item. This means that many of the items you come to expect such as Choice Band cannot be found. In addition to this, Abilities also aren’t in the game.